Gas-lamp.



l lPATENTEU APR. 26,19%. A. E. LOVBTT.v

GAS LAMP.

APPLIUATION FILED MAY 26, 1903. BENBWED MAB.. 28, 1994.

NO MIDDEL.

n: scams :crans w.. Pumournoc. wmucvou. nv n adjustment for admitting gas to only one' Patented April 2e, 1904,.

PATENT OFFICE.

ALBERT E. LOVFTT, OF NEW'YORK, N. Y.

SPECIFICATION forming part of Letters Patent NC'.` 758,261, dated April 26, 1904.

A Application died May 26, 1903. Renewed March 28, 1904. Serial No. 200,442. (No model.)

To all whom, it may concern:

Be it known that I, ALBERTE. Lovn'r'r, a citizen of the United States, residing in New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Gas-Lamps, of which the following is a specification.

This invention relates to gas-lamps of the class in which incandescent or mantle burners are clustered at the central portion of the lamp to give a powerful light.

The objects of the invention are to im prove the appearance and increasethe light-giving power of the lamp, tov provide a more durable pilot-light, to provide-for draining ofi' water which accumulates in the feed-pipe, to provide for lighting only one burner of the cluster when so desired, and otherwise to improve the construction. Y

In the drawings forming part of this speciiication, Figure 1 is an elevation of a lamp made in accordance with my present improvements. Fig. 2 is a View, on a smaller scale, similar to Fig. '1, except that the reflector is omitted. Fig. 3 is a sectional elevation of the lamp, the lower portion Aof the globe being broken away and portions being omitted. Fig. 4 is a sectional detail of a burner. Fig. 5 is a perspective view of a valve having a hollow stem. Fig. 6 is a detail showing principally the burner-head and the burner-valve therein. Fig. 7 is a view showing the valve burner. Fig. 8 is a sectional view 'of the head and the cluster of burners thereon and showing the valve open to admit the gas to all of the burners.

In the several views like signs denote like parts. j

Upon the lower end of a central pendent gassupply stern 1 is xed a head 2, from which radiate nipples 3, preferably four in number, upon which are erected burners 4L, 5, 6, and 7 these burners being clustered closely about said central stem and being provided with mantles 8. A large translucent glass globe 9 is supported upon a holder 10, which is held up against a shoulder 11 at the lower end of the head 2 by a thumb-nut 12, which engages a threaded projection 13 upon the head. An

ornamental cup 14 is detachably suspended from said collar 10 byV means of headed pins or screws 15, secured in the collar, and suitable angle-slots 16, formed in the cup. Above the globe a iangedshade 17, preferably of translucent` glass, is supported upon a spider 18 and both the globe and the shade being provided withlarge top openings to permit free ascent of the heated air.

Above the globe and shade is suspended a glass draft-drum`19 by means of a spider 20, which is secured to the stem 1, near the upper end thereof, said draft-drum being provided at its upper end with a flange 21, under which take supporting-screws 22, provided upon the spider. 'Ihis draft-drum overcomes the fault of the usual metallic drums of being liable to tarnish from the action of the heat. cooler than the usual metal drum, which is an important advantage in warm weather, especially when the lamp is used in a room with a low ceiling, since the glass drum does not radiate heat 'to an objectionable degree. It will be noted that the drum is quite near the mantles, so that a very large proportion oi' the light emitted from the latter strikes the inner walls ofthe drum, and owing to the translucent quality of the latter` the advantage of the lamp for light-giving purposes is materially. enhanced. The glass draft-drum is,

` moreover, less expensive than the metal drum ordinarily used in lamps of this character and agrees much better than a metal drum does with the glass shade 17 and the glass globe 19,

giving the lamp the appearance of being all' glass and rendering it moreattractive to the purchaser than one having a metal draft-drum, while the'unsightliness of the heattarnished or blackened metal drum in daylight is avoid ed. It will be seenthat the draft-drum at its lower endvrinclses the upper portion of the shade 17, as well as the globe 9. As indicated at Fig. 2, the shade 17 may be omitted in some cases. The. draft-drum is preferably translucent, cylindrical, and of less diameter than the globe, while having sufiicient height to produce the necessary draft for the cluster or' burners.

Above the draft-drum I preferably support a glass canopy 23 by means of a spider 24,

Moreover, a glass drum keeps much' which is attached to the upper end of the stem 1. This canopy, however, may be omitted in some cases.

Upon the stem 1 just below the spider 18 I secure a collar by means of a set-screw 26, said collar having formed therein radial slots 27, four in number, in which slots are seated wire hooks 28, the slots being vof such width that the hooks fit snugly therein and the hooks l having downwardlybent retaining arms or fingers 29, which are inserted through holes 30, formed in the collar coincidently with the slots 27. From these hooks depend the mantles 8. It will bey seen that after a hook is inserted in the loop 31 of the mantle the linger 29 of the hook may be dropped through the hole 30 and the hook itself may y become seated in the slot 27, whereby the hook and mantle are firmly supported.

A pilot-tube 32 is threaded at its lower end at 33 into a hole formed in the upper part of the head 2 and extends up close alongside of the central stem 1 to a point between the two burners 6 and 7, and by this arrangement the pilot may be situated sufficiently nearthe central point to escape the great heat of the burners and avoid it beingl burned off. It will be understood that in this class of lamps it is desirable to cluster the mantles as closely as practicable to the central stem and that the projection of the pilot when it is projected directly from the stem at the mantles is necessarily so great that it comes too close to the man- -tles and in practice is soon ruined by the heat.

These objections are overcome by using along pilot-tube, inserted in the head 2 at the base of the stem 1 and extending up close alongside of the stem and giving the tube a slight outward bend 34 at its Lipper end between the mantles. The tip 34 of the pilotis much closer to the central tube 1 than is found practicable with the old style of pilot, and all liability of burning of the metal is avoided. Moreover, it is less diiicult and expensive to attach the pilot to the head (which is cast in the` proper form for supporting the pilot) than it is to attach it to the tubular stem 1.

To regulate admission of gas to the pilot, I provide a port 35 in the head communicating withf the pilot-socket 33 and also communicating with. a central passage 36, which extends A through the head 2 from top to bottom, and

in the said port 35 I tap a valve-screw 69, which may be screwed in sufciently to entirely close the hole 33, as seen at Fig. 6, or it may be screwed out as far as desired to regulate the flow of gas into the pilot.

A conical hollow valve 37, open at its top or narrow end, is fitted within the central passage 36 in the head 2 and provided with ports 38, 39, 40, and 41 for admitting gas to the burners 4, 5, 6, and 7, respectively. The ports 38, 39, and 40 match the nipple ports or openings 42, 43, and 44 in the head, while the port 41 is extended so as to form aslot extending partly around the valve, as seen best at Fig. 5, so that .itmay communicate with its nippleport 45, as at Fig. 7, while the ports 38, 39, and 40 are out of communication with the openings 42, 43, and 44 for the other burners. By rotating the valve slightly from its closed position the burner 7 may be lighted, while no gas is admitted to any other burner, thereby enabling the lamp to be operated with either one or all four burners, as may be desired, thus conducing to economy in the use of the lamp.

The valve 37 is formed with an integral stem 46, having a shoulder 47 at its lower end, be-

neath which the stem is prolonged at 48 and reduced in diameter. The portion 46 of the stem is confined in the passage 36 of the head 2 by means of a cap-screw 49, having a central opening 50 to lit the reduced stem portion 48, and a compression spring 51 is coiled around the stem 46 and by bearing at its lower end upon said screw 49 and at its upper end A beneath the base of the valve 37 serves to press the latter upwardly to iit closely in its conical socket. So long as the'stem portion 46 has a shoulder 47 it is not essential that it bc of uniform thickness throughout.

For drawing off the water which accumulates and is liable to freeze in the head 2 or the supply-tube 1 I make the stem 46 48 hollow, as at 52, and thread into Vthe lower end of the stem, as at 53, a nipple 54, formed upon the top of a spherical or other head 55 and having a port 56 communicating with the hollow 52 of the valve-stem 48, and transversely to vsaid head I insert a rotatable valve 57, having a vent 58 at one end and a slotted head 59 at the other end for turning the valve in inits seat. Said valve has atransverse opening 60, which when the valve is turned com municates with t-he port 56, as seen at Fig. 6, thereby permitting the water to escape at 58. Normally the valve is closed; but it may be opened from time to time,as required. The end of the valve opposite the head 59 is provided with a nut 62, which cooperates with said head to retain the valve in its seat.

To the4 lower end of the head 55 I attach a key 63 by means of a screw 64, said key having a stem 65, which fits upon a nipple depending from the head 55 and serving as a bearing for said screw. The key 63 controls the valve 37 for turning on and olf the lights, and the latter is provided with a notch havingside walls 66 and 67 for cooperating with a stop-pin 68, projecting inwardly from the head 2 to arrest said valve in its fully-opened and fully-closed positions.

Variations may be resorted to within the scope of my invention, and portions of my improvements may be used without others.

,Having thus described my invention, I claim- 1. A lamp comprising a pendent stem, a head upon its lower end, a cluster of burners sur- IOO rounding said stem and supported upon said head, a central valve for admitting gas to the burners, said valve having a pendent hollow stern, a key upon said stem, a valve also carried byl said stem for draining oiv accumulated water, a spider upon said head, a translucent globe supported thereby, a reiiector, draft-drum and canopy, and means for supporting the same. 4

2. A gas-lamp comprising a pendent stem a head upon its lower end, a cluster of burners surrounding said stem and supported upon said head, a central valve for admitting gas to the burners, said valve having a pendent hollow stem, a key upon said stem, a valve also carried by said stern between said key and said valve for draining off accumulated water, a spider on said head, a translucent globe supported thereon, a translucent reiector, draft drum and canopy, and separately independent means for supporting the same.

3. The combination of a pendent stem, a head upon its lower end, a cluster of burners surrounding said stern and supported upon said head, a central valve for admitting gas to 1the burners, said valve having a pendent hollowstein, a key upon said stem, and a valve also carried by said stem for draining olf` accumulated water. L

4. The combination of a pendent stem, a head upon itslower end, a cluster of burners surrounding saidv stem and supported upon said head, a central valve for admitting gas to the burners, said valve having apendent hollow stem, a key upon said stem, and avalve also carried by said stem between said key and said valve for draining off accumulated water.

5. rlhe combination of a pendent stem, a

head upon its lower end, a cluster of burners surrounding said stem and attached to said head, a central hollowvalve having ports for controlling the admission of gas to said burners, said Valve having a pendent hollow stem, a head upon the lower end of said stem, said head having a port in communication with the hollow of said stem, and a valve in said head for draining accumulated water from said stem.

6. The combination of a pendent stem, a

'end a head whereby it may be turned and head, a central hollow valve having ports for controllingY the admission of gas to said burners, said valve Vhaving a pendent hollow stem, a head upon the lower end of said stern, said head having a port in communication with the hollow of said stem, and a valve in said head for draining accumulated water from said stem; said valve extending through said head transversely of said port, and having at one at the other end securing means.

7. The combinationV of a pendent stem, a

head Vupon its lower end, a cluster of burnersy surrounding said stem and attached to said head, a central hollow valve having ports for controlling the admission of gas to said hurners, said valve having a pendent hollow stem, a head upon the lower end of said stem, said head having a port in communication with the hollow of said stem, a valve in said head for draining o accumulated water, and a key xed upon the last-mentioned head.

8. The combination of a pendent stem, a head upon its lower end, said head having a central passage, a cluster of burners surrounding said stem and attached to said head, acentral conical valve fitting in said passage and having ports for controlling admission of gas to said burners, a depending hollow integral key-stern upon said valve, a shoulder formed upon said stem, the latter having a reduced portion below said shoulder, a cap-screw closing the lower end of the passage in said head and having a perforation through which the lower end of said stem passes, a compressionspring surrounding said stem between said valve and said cap-screw; a head upon the lower end of said stern, said head having a port in communication with the hollow `of said stem, and a valve in said head for draining accumulated water from said stem.

Signed at Nos. 9 to 15 Murray street, New York, N. Y., this 25th day of May, 1903.

ALBERT n Lovn'rr. l

Witnesses: v

B. C. STIGKNEY, FRED. J. DOLE. 

